2.4 Monitoring Faults

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Vocabulary

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Creep Meters: its a device that uses a wire thats stretched across a fault to measure horizontal
movement of the ground
Laser-Ranging Devices: its a device that uses laser beam to detect even small fault movements
Tiltmeters: it measures when the ground tilts
Satellite Monitors: its a radar that make images of faults, radio waves bounce off the ground

Outline

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Devices that Monitor Faults

• geologists invents tools to record movements from the ground that occur along faults
  • the tools they make measures stress and it also sees if there is deformation in the crust
• geologists uses this to see if there are signs that an earthquake is going to happen
  • the only clues that geologists found

Creep Meters

• creep meters they measures horizontal movement on Earth's ground
  • On the device they use to measure horizontal movement is that they have wire attached to a weight that is able to slide if the fault moves, and the other side the wire is anchored to a post
• Geologists are able to measure how much the weight moved against the measuring scale

Laser-Ranging Devices

• laser-ranging devices use laser beams to detect small movement around the fault

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** this device collects the data when the laser beam travels to the reflector and bounces back

• Geologists use this device to see if the fault's action changes

Tiltmeters

• tiltmeters takes data of the ground's movement

Monitoring risk in the united states

• in order to find out when an earthquake might happen geologists look where past earthquakes have happened

• the northern part of the united states have had a lot of big earthquakes
  • the most earthquakes happen near the pacific area

this is the tiltmeater